New information moves markets, and the larger impact it has, the more it will move markets, because markets are built on information. And obviously the function of the free press is to uncover and disseminate new information, the more meaningful the better. So it's not underhanded -- it's noble and completely aligned with good.

(Of course if reporters make up information or lie it's bad, but that's a separate issue, for which lazy or unethical reporters are generally fired.)